added bans

app/models/ban.rb

@@ -0,0 +1,53 @@
+class Ban < ActiveRecord::Base
+  after_create :update_feedback
+  belongs_to :user
+  belongs_to :banner, :class_name => "User"
+  attr_accessible :reason, :duration, :user_id
+  validate :user_is_inferior
+  
+  def self.is_user_banned?(user)
+    exists?(["user_id = ? AND expires_at > ?", user.id, Time.now])
+  end
+  
+  def self.is_ip_banned?(ip_addr)
+    exists?(["ip_addr = ? AND expires_at > ?", ip_addr, Time.now])
+  end
+  
+  def user_is_inferior
+    if user
+      if user.is_admin?
+        errors[:base] << "You can never ban an admin."      
+        false
+      elsif user.is_moderator? && banner.is_admin?
+        true
+      elsif user.is_moderator?
+        errors[:base] << "Only admins can ban moderators."
+        false
+      elsif banner.is_admin? || banner.is_moderator?
+        true
+      else
+        errors[:base] << "No one else can ban."
+        false
+      end
+    end
+  end
+  
+  def update_feedback
+    if user
+      feedback = user.feedback.build
+      feedback.is_positive = false
+      feedback.body = "Banned: #{reason}"
+      feedback.creator_id = banner_id
+      feedback.save
+    end
+  end
+  
+  def duration=(dur)
+    self.expires_at = dur.to_i.days.from_now
+    @duration = dur
+  end
+  
+  def duration
+    @duration
+  end
+end

app/models/user.rb

@@ -12,6 +12,8 @@ class User < ActiveRecord::Base
   validates_confirmation_of :password
   before_save :encrypt_password
   after_save :update_cache
+  before_create :normalize_level
+  has_many :feedback, :class_name => "UserFeedback", :dependent => :destroy
   scope :named, lambda {|name| where(["lower(name) = ?", name])}  
   
   module NameMethods
@@ -92,10 +94,29 @@ class User < ActiveRecord::Base
     end
   end
   
+  module LevelMethods
+    def normalize_level
+      if is_admin?
+        self.is_moderator = true
+        self.is_janitor = true
+        self.is_contributor = true
+        self.is_privileged = true
+      elsif is_moderator?
+        self.is_janitor = true
+        self.is_privileged = true
+      elsif is_janitor?
+        self.is_privileged = true
+      elsif is_contributor?
+        self.is_privileged = true
+      end
+    end
+  end
+  
   include NameMethods
   include PasswordMethods
   extend AuthenticationMethods
   include FavoriteMethods
+  include LevelMethods
 
   def can_update?(object, foreign_key = :user_id)
     is_moderator? || is_admin? || object.__send__(foreign_key) == id

app/models/user_feedback.rb

@@ -0,0 +1,5 @@
+class UserFeedback < ActiveRecord::Base
+  set_table_name "user_feedback"
+  belongs_to :user
+  attr_accessible :body, :user_id, :is_positive
+end